904985840 has 40 divisors (see below), whose sum is σ = 2295375408. Its totient is φ = 329085440.

The previous prime is 904985839. The next prime is 904985863. The reversal of 904985840 is 48589409.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513317 + ... + 515076.

Almost surely, 2^904985840 is an apocalyptic number.

It is an amenable number.

904985840 is an abundant number, since it is smaller than the sum of its proper divisors (1390389568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

904985840 is a wasteful number, since it uses less digits than its factorization.

904985840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028417 (or 1028411 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 904985840 is about 30082.9825648987. The cubic root of 904985840 is about 967.2689822712.

The spelling of 904985840 in words is "nine hundred four million, nine hundred eighty-five thousand, eight hundred forty".